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Caution
！
1. Before piping
Before piping, perform air blow (flushing) or cleaning to remove any cutting chips, cutting oil, dust, etc.
from the piping.
2. Sealant tape
When screwing piping or fittings into ports, ensure that chips from the pipe threads or sealing material do
not enter the Shuttle valve piping. If sealant tape is used, leave 1 thread ridges exposed at the end of the
threads.
3. Connection of R and NPT fittings
1) First, tighten the fitting by hand, then use a suitable wrench or hexagon wrench to tighten the
hexagonal portion of the body or the hexagon socket portion a further 2 or 3 turns.
To find the appropriate tightening torque, see the table below.
Connection thread size
(R, NPT)
1/8
1/4
4. Follow the procedures of the manufacturer when fittings other than SMC are used.
Confirm that no problem will occur in the operating conditions.
5. If positioning is required, if the fitting is loosened after it has been tightened, it may
cause air leakage.
Caution
！
1. The product has been lubricated for life by the manufacturer, and does not require
lubrication in service.
2. Use turbine oil Class 1, ISO VG32 (with no additives), if lubricated.
Besides, if the lubrication is suspended halfway, the original lubricant will be lost and may result in a
malfunction. Be sure to keep lubricating continuously. Refer to SMC website for brand name of the
lubricants compliant with Class 1 turbine oil (with no additives), ISO VG32.
Piping
Tightening torque
[N・m]
3 to 5
8 to 12
Lubrication
5
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